l = list(map(int, input().split()))
l.sort()
res = (l[1]-l[0])+(l[2]-l[1])
print(res)
876A - Trip For Meal | 1326B - Maximums |
1635C - Differential Sorting | 961A - Tetris |
1635B - Avoid Local Maximums | 20A - BerOS file system |
1637A - Sorting Parts | 509A - Maximum in Table |
1647C - Madoka and Childish Pranks | 689B - Mike and Shortcuts |
379B - New Year Present | 1498A - GCD Sum |
1277C - As Simple as One and Two | 1301A - Three Strings |
460A - Vasya and Socks | 1624C - Division by Two and Permutation |
1288A - Deadline | 1617A - Forbidden Subsequence |
914A - Perfect Squares | 873D - Merge Sort |
1251A - Broken Keyboard | 463B - Caisa and Pylons |
584A - Olesya and Rodion | 799A - Carrot Cakes |
1569B - Chess Tournament | 1047B - Cover Points |
1381B - Unmerge | 1256A - Payment Without Change |
908B - New Year and Buggy Bot | 979A - Pizza Pizza Pizza |